<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>用户输入信息</title>
</head>

<body>
    <script>
        let number = parseInt(prompt("请输入一个数"));
        if (number % 2 == 0) {
            let t = "偶数";
            alert("这个数为" + t);
        } else {
            let t = "奇数";
            alert("这个数为" + t);
        }
    </script>
</body>

</html>